There are two advisories for noises, one is for the scanner assembly, the other is the printer body, the printer body makes a noise whenever the main engine is turning.
The scanner one is noticeable when documents are being scanned.
Either way you need to call it into HP, they normally need parts replacing, the scanner issue can sometimes be cured by a firmware updated, low res scans of 200dpi can cause noise so changing the scan res produces a change, sometimes it won't and you need to look at part replacement.